Certified Backflow Testing &
Prevention in Ontario, CA
We test, certify, and file your backflow report directly with City of Ontario Utilities — same day. No paperwork, no trips to the water department.
Our Services
Everything you need for backflow compliance — handled in one visit.
Annual certified backflow testing required by California law. We test your assembly, certify results, and file directly with your water district.
On-site backflow repair when your device fails inspection. We carry parts for all major brands and retest on the same visit.
Professional installation of new backflow prevention assemblies for residential, commercial, and industrial properties.
Full replacement of aging or failed backflow prevention devices. We remove, install, test, and file all paperwork.
We track your annual testing deadlines, schedule appointments, and file reports — so your properties stay compliant year after year.
Why Ontario Backflow Tests?
We're local to Ontario, CA — not a national franchise. We know City of Ontario Utilities requirements and get you compliant fast.
Call 909-787-1122Get a Free Quote
Call us at 909-787-1122 or fill out the form below. We'll get back to you same day.